Table 1

Mean total sleep duration and mean bedtimes and wake times for children with autistic spectrum disorders (ASDs) compared with the rest of the cohort

	Children with ASD					Rest of the cohort					Difference in duration
		Mean sleep timings (24 h clock)		Mean total sleep duration (m)			Mean sleep timings (24 h clock)		Mean total sleep duration
Age (months)	n	Bed	Wake	Mean	SD	n	Bed	Wake	Mean	SD	Mean Diff (min)	CI of difference (min)	p Value*
6	67	20:05	7:02	13 h 24 m	1 h 44 m	11 230	20:08	6:56	13 h 12 m	1 h 43 m	+12	(−13 to +37)	0.35
8	73	19:39	7:02	12 h 51 m	1 h 11 m	10 704	19:46	7:06	12 h 47 m	1 h 13 m	+4 min	(−13 to +21)	0.62
30	65	19:52	6:42	11 h 41 m	1 h 05 m	9555	19:50	7:04	11 h 58 m	1 h 05 m	−17 min	(−1 to −33)	0.032
42	63	20:01	6:47	11 h 03 m	1 h 15 m	9522	19:46	7:02	11 h 31 m	0 h 56 m	−28 min	(−14 to −42)	0.001
69	60	20:11	6:57	10 h 48 m	1 h 04 m	8490	19:52	7:10	11 h 18 m	0 h 42 m	−30 min	(−19 to −41)	<0.0001
81	57	20:28	6:54	10 h 26 m	0 h 56 m	8208	20:04	7:12	11 h 09 m	0 h 40 m	−43 min	(−32 to −53)	<0.0001
115	55	21:02	7:03	10 h 01 m	1 h 04 m	7761	20:51	7:17	10 h 27 m	0 h 39 m	−26 min	(−16 to −37)	<0.0001
140	39	21:28	6:57	9 h 29 m	0 h 56 m	7043	21:21	7:10	9 h 49 m	0 h 39 m	−20 min	(−8 to −32)	0.001

*t test.